ice: Add code for DCB initialization part 3/4

This patch adds a new function ice_pf_dcb_cfg (and related helpers)
which applies the DCB configuration obtained from the firmware. As
part of this, VSIs/netdevs are updated with traffic class information.

This patch requires a bit of a refactor of existing code.

1. For a MIB change event, the associated VSI is closed and brought up
   again. The gap between closing and opening the VSI can cause a race
   condition. Fix this by grabbing the rtnl_lock prior to closing the
   VSI and then only free it after re-opening the VSI during a MIB
   change event.

2. ice_sched_query_elem is used in ice_sched.c and with this patch, in
   ice_dcb.c as well. However, ice_dcb.c is not built when CONFIG_DCB is
   unset. This results in namespace warnings (ice_sched.o: Externally
   defined symbols with no external references) when CONFIG_DCB is unset.
   To avoid this move ice_sched_query_elem from ice_sched.c to
   ice_common.c.

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 1 insertions, 26 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_sched.c b/drivers/net/ethernet/intel/ice/ice_sched.c
index 3d1c941a938e..124feaf0e730 100644
--- a/drivers/net/ethernet/intel/ice/ice_sched.c
+++ b/drivers/net/ethernet/intel/ice/ice_sched.c
@@ -127,7 +127,7 @@ ice_aqc_send_sched_elem_cmd(struct ice_hw *hw, enum ice_adminq_opc cmd_opc,
  *
  * Query scheduling elements (0x0404)
  */
-static enum ice_status
+enum ice_status
 ice_aq_query_sched_elems(struct ice_hw *hw, u16 elems_req,
                          struct ice_aqc_get_elem *buf, u16 buf_size,
                          u16 *elems_ret, struct ice_sq_cd *cd)
@@ -138,31 +138,6 @@ ice_aq_query_sched_elems(struct ice_hw *hw, u16 elems_req,
 }
 
 /**
- * ice_sched_query_elem - query element information from HW
- * @hw: pointer to the HW struct
- * @node_teid: node TEID to be queried
- * @buf: buffer to element information
- *
- * This function queries HW element information
- */
-static enum ice_status
-ice_sched_query_elem(struct ice_hw *hw, u32 node_teid,
-                     struct ice_aqc_get_elem *buf)
-{
-        u16 buf_size, num_elem_ret = 0;
-        enum ice_status status;
-
-        buf_size = sizeof(*buf);
-        memset(buf, 0, buf_size);
-        buf->generic[0].node_teid = cpu_to_le32(node_teid);
-        status = ice_aq_query_sched_elems(hw, 1, buf, buf_size, &num_elem_ret,
-                                          NULL);
-        if (status || num_elem_ret != 1)
-                ice_debug(hw, ICE_DBG_SCHED, "query element failed\n");
-        return status;
-}
-
-/**
  * ice_sched_add_node - Insert the Tx scheduler node in SW DB
  * @pi: port information structure
  * @layer: Scheduler layer of the node